| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] often [vb pp] that [det] | 15 |
|
| 2 | it be often [vb pp] that [det] | 15 |
|
| 3 | it [is] often [vb pp] that [det] | 14 |
|
| 4 | it is often [vb pp] that [det] | 13 |
|
